A comparative study of microstructure, magnetic, and electromagnetic properties of Zn2W hexaferrite prepared by sol–gel and solid-state reaction methods

Fan, Lining; Zheng, Hui; Zhou, Xuefan; Wu, Qiong; Zheng, Peng; Zheng, Liang; Zhang, Yang

doi:10.1007/s10971-020-05364-2

Cited by 9 publications

(6 citation statements)

References 33 publications

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“…8:1 mole ratio of Fe/Ba was the best, and optimum KOH dose was 4.0 g for single-phase BaFe 12 O 19 . Fan et al [101] investigated the structure, magnetic, and EM properties of Zn 2 W hexagonal ferrite. The sol-gel method produced single-phase Zn 2 W hexaferrite with high grain compared to the solid-state reaction.…”

Section: Synthesis Methods Of the Hexagonal Ferritesmentioning

confidence: 99%

“…Fan et al. [ 101 ] investigated the structure, magnetic, and EM properties of Zn 2 W hexagonal ferrite. The sol–gel method produced single‐phase Zn 2 W hexaferrite with high grain compared to the solid‐state reaction.…”

Section: Synthesis Methods Of the Hexagonal Ferritesmentioning

confidence: 99%

“…[99,100] W-type materials exhibit a sizeable magnetic loss in a particular highfrequency band and have excellent potential as magnetic absorption materials. [101] Divalent ions can be substituted to modify magnetic characteristics, [102] and electromagnetic properties can be affected by rare earth element replacement due to its typical relaxation characteristics. [66,103] Qin et al [104] formed MnZn-doped W-type and MW absorption in the 2-18 GHz region.…”

Section: W-type Hexaferritementioning

confidence: 99%

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Recent Progress in Hexagonal Ferrites Based Composites for Microwave Absorption

Mohammed

Mohammed²,

Srivastava

2022

Cryst. Res. Technol.

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With the fast growth of wireless communication technology in high‐frequency ranges, electromagnetic (EM) interference has become a growing concern that has drawn international attention. The development of materials that can absorb EM radiation is a crucial solution. This review provides a detailed overview of ferrites, specifically hexagonal ferrites and their composites for microwave (MW) absorption. It examines hexagonal ferrite classifications based on the stacking order of their fundamental blocks and their synthesis methods and strategies for improving their magnetic properties. On the other hand, this review included a detailed examination of hexagonal ferrites–conducting polymer, hexagonal ferrites–2D materials, and hexagonal ferrite–other nanomaterials composites for MW absorption applications. Enhancing MW absorption in hexagonal ferrites‐based microwave absorption materials (MAMs) regulates their EM characteristics, improves impedance matching, and creates a diversity of loss mechanisms. In addition, the limitations, challenges, and opportunities of hexagonal ferrites‐based MAMs are discussed, which will be helpful to those working in related areas. As a general application potential, it is worth mentioning that, as a result of recent promising findings in the synthesis of hexagonal ferrites‐based composites, hexaferrite‐based composites are suitable devices in the area of microwave absorption.

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Section: Synthesis Methods Of the Hexagonal Ferritesmentioning

confidence: 99%

Section: Synthesis Methods Of the Hexagonal Ferritesmentioning

confidence: 99%

Section: W-type Hexaferritementioning

confidence: 99%

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Recent Progress in Hexagonal Ferrites Based Composites for Microwave Absorption

Mohammed

Mohammed²,

Srivastava

2022

Cryst. Res. Technol.

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“…Recently, RAMs based on nanosized fillers and powders with a nanosized crystalline structure have become increasingly important [ 44 , 45 ]. It is known that crystalline ferromagnetic powders have a large domain size, and therefore, the process of rotation of the magnetization vectors is hindered [ 46 ].…”

Section: Radio-absorbing Materials and Technologies For Their Productionmentioning

confidence: 99%

Radio-Absorbing Materials Based on Polymer Composites and Their Application to Solving the Problems of Electromagnetic Compatibility

et al. 2022

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Recently, designers of electronic equipment have paid special attention to the issue of electromagnetic compatibility (EMC) of devices with their own components and assemblies. This is due to the high sensitivity of semiconductor microcircuits to electromagnetic interference. This interference can be caused either by natural phenomena, such as lightning strikes, or by technical processes, such as transients in circuits during fast periodic or random switching. Either way, interference implies a sudden change in voltage or current in a circuit, which is undesirable, whether it propagates along a cable or is transmitted as an electromagnetic wave. The purpose of this article is to review the works devoted to the development, creation, and investigation of modern polymeric nanocomposite materials used for shielding electromagnetic radiation and their effective application for solving problems of electromagnetic compatibility. Additionally, the approach to design EMI shielding complex media with predetermined parameters based on investigation of various properties of possible components is shown. In the review, all polymer composites are classified according to the type of filler. The issues of the interaction of a polymer with conductive fillers, the influence of the concentration of fillers and their location inside the matrix, and the structure of the nanocomposite on the mechanisms of electromagnetic interaction are considered. Particular attention is paid to a new generation of nanocomposite materials with widely adjustable electrical and magnetic properties. A wide class of modern filled polymeric materials with dielectric and magneto-dielectric losses is considered. These materials make it possible to create effective absorbers of electromagnetic waves that provide a low level of reflection coefficient in the microwave range. The model mechanisms for shielding electromagnetic radiation are considered in the paper. A detailed review of the electro-physical properties of polymer nanocomposites is provided. Multilayer electrodynamic media containing combinations of layers of filled polymer composite materials with nanoparticles of different compositions and manufactured using a single technology will make it possible to create electrodynamic media and coatings with the required electro-physical characteristics of absorption, transmission, and reflection. Within the framework of the two-layer coating model, the difference in the effects of the interaction of electromagnetic radiation with conductive layers located on a dielectric and metal substrate is demonstrated. It is shown that in order to achieve optimal (maximum) values of reflection and absorption of electromagnetic radiation in the appropriate frequency range, it is necessary to fit the appropriate layer thicknesses, specific conductivity, and permittivity. Such approach allows designers to create new shielding materials that can effectively vary the shielding, absorbing, and matching characteristics of coatings over a wide frequency band. In general, it can be said that the development of innovative polymer composite materials for shielding electronic devices from electromagnetic interference and excessive electromagnetic background is still an important task. Its solution will ensure the safe and uninterrupted operation of modern digital electronics and can be used for other applications.

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“…Barium hexaferrite with high saturation magnetization was synthesized using the sol-gel method showing a total shielding e ectiveness value in absorbing radiation above 20 dB with a maximum total shielding e ectiveness value of 31.97 dB at 10.30 GHz with a thickness of 2 mm Carol et al, 2020 however the resulting ferrite nanoparticles are less pure due to contamination from the reaction byproducts (Kefeni et al, 2017). The solid-state reaction method involves heating a mixture of oxide and barium carbonate powder to produce the desired phase at low raw material costs and a simple process (Fan et al, 2020). In this case, hydrothermal synthesis is very suitable as a method that combines plant extracts with ferrite-based magnetic materials based on the results of the literature review in Table 3.…”

Section: Modification Of Materials Development For Barium Hexaferrite and Piper Betle Linnmentioning

confidence: 99%

Review of The Effectiveness of Plant Media Extracts in Barium Hexaferrite Magnets (BaFe12O19)

Edianta

Fauzi

Naibaho

et al. 2021

sci. technol. indones.

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Betel leaf is a typical Indonesian herbal plant that propagates on other tree trunks. So far, betel leaf has only been used in biomedicine and traditional medicine, whereas the chemical compounds of betel leaf can be used to absorb electromagnetic waves. In this mini-review, we review several research results to discuss the potential effectiveness of betel leaf in barium hexaferrite as an absorber of electromagnetic radiation. We compiled this mini-review based on the literature review method that is discussed extensively and in-depth regarding the chemical composition of betel leaf, modification of the development of barium hexaferrite material with betel leaf media extract, characteristics of BaFe12O19 as absorption of electromagnetic waves, and the effectiveness of media extracts in BaFe12O19 as absorption of electromagnetic waves. Based on the results of the literature review, the modification of BaFe12O19 material synthesis can include microemulsion, solid-state, coprecipitation, sol-gel, and hydrothermal synthesis. So far, hydrothermal synthesis is a synthesis method of mixing betel leaf extract media and ferrite-based magnets that have been studied before. Betel leaf in ferrite-based magnetic materials has been studied not to damage the surface morphology and characteristics of the magnetic material. The results of the assessment also show the effectiveness of adding other elements or compounds such as Ni, Al2O3, and composites in ferrite-based magnetic materials that can absorb more than 90% of electromagnetic waves in the frequency range 2-18 GHz.

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A comparative study of microstructure, magnetic, and electromagnetic properties of Zn2W hexaferrite prepared by sol–gel and solid-state reaction methods

Cited by 9 publications

References 33 publications

Recent Progress in Hexagonal Ferrites Based Composites for Microwave Absorption

Recent Progress in Hexagonal Ferrites Based Composites for Microwave Absorption

Radio-Absorbing Materials Based on Polymer Composites and Their Application to Solving the Problems of Electromagnetic Compatibility

Review of The Effectiveness of Plant Media Extracts in Barium Hexaferrite Magnets (BaFe12O19)

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